下面是小强同学生活中的三个情境，请你运用所学知识，对其进行探究。

    BUS SERVICE

    New York City — Brennan, New Jersey

    (Trip time: 30 minutes each way )

    Timetable

    Buses leave the Railway Station, New York 7:00 a.m. and every half-hour thereafter(此后) until 11:30 p.m. (7 days a week).

    Buses leave Brennan Station 20 minutes before and after every hour from 6:20 a.m. to 10:40 p.m. (7 days a week ).

    Evening rush hours(5:00 p.m. to 7:00 p.m.) buses leave the Railway Station, New York every 15 minutes (Monday — Friday).

    Holidays: buses leave every hour on the hour time, each direction.

All tickets must be bought at Window 12, the Railway Station, New York, or at the Brennan Station Window before boarding buses.

式子$\sqrt{x-1}$在实数范围内有意义，则$x$的取值范围是（  ）

在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密，每处不超过15个字。

    到了工业化后期，经济发展、产业结构的优化升级，使人们对环境的态度从“先污染，后治理”慢慢转换到了预防性治理。这种预防性治理既体现在污染治理上，①____。生产技术的进步会提高生产率，带来更加清洁的生产流程，改善资源的使用效率，从而②____。国际先进的化工企业，一直在不断研发新技术新产品，并已经在出行、食品和能源等方面给我们带来了最新的环保措施。比如，汽车采用新型的高强度轻量化材料，③____。